http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49136
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.05.24 10:03:34
CC| |jakub at gcc dot gnu.org
Ever Confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-24
10:03:34 UTC ---
The problem is that fold optimizes dd.n != 7 comparison into
(bit_field_ref <dd, 8, 0> & 224) != 224 - see optimize_bit_field_compare -
and cxx_eval_bit_field_ref doesn't expect a bit_field_ref which covers more
than one bit field. One possible fix would be to check also the size in
cxx_eval_bit_field_ref and or in at the right position all the bit fields in
the range, another would be make sure such folding doesn't happen during
constexpr processing.
